A method for preparing lightweight ceramsite by using bio-coal ecological sintering spoil

A light-weight ceramsite and bio-coal technology, applied in the field of materials, can solve the problems of construction waste recycling rate of less than 5%, incompatible with green environmental protection, ecological environment damage, etc., to reduce the consumption of fossil energy and electric energy, The effect of reducing clay loss and protecting the environment

Active Publication Date: 2021-05-11
TONGJI UNIV
View PDF17 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the recycling rate of construction waste is less than 5%.
[0004] In the prior art, the main raw material for the production of ceramsite is clay, supplemented with fly ash, various additives and fluxes, which are stirred, formed into balls, and then sintered at high temperature to prepare various ceramsite products, but a large amount of clay is used It will cause damage to the ecological environment and does not meet the current national strategic requirements such as green environmental protection
[0005] In recent years, there have been many studies on using sludge and construction dregs as raw materials instead of clay to fire ceramsite. Patent CN201510471059.3 discloses a method for producing ceramsite using sludge and fly ash as raw materials, but in this method It is necessary to strictly control the moisture content of the sludge, and too many steps of heating and cooling in the firing process will consume a lot of energy, prolong the process of firing ceramsite, and reduce production efficiency
[0006] At the same time, in the prior art, electric heating or bituminous coal is mostly used as fuel for high-temperature calcination of ceramsite. Although high-temperature calcination will speed up the production efficiency of ceramsite, it will waste a lot of energy at the same time. Therefore, combining a more environmentally friendly and efficient The calcination method is imperative

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for preparing lightweight ceramsite by using bio-coal ecological sintering spoil
  • A method for preparing lightweight ceramsite by using bio-coal ecological sintering spoil
  • A method for preparing lightweight ceramsite by using bio-coal ecological sintering spoil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Construction spoils are all construction dregs, and additional fly ash needs to be added for compounding.

[0046] The high-temperature sintered spoil lightweight ceramsite is fired according to the following formula:

[0047]

[0048] In the above formula, the construction spoil, fly ash, fly ash for compounding, granite tailings powder, waste glass powder, silicon carbide and limestone powder are all in parts by mass.

[0049] The steps of the preparation method of the above-mentioned ecological sintered spoil lightweight ceramsite are as follows:

[0050] (1) Sieve the construction spoil to obtain coarse and fine materials with large particle size.

[0051] (2) Further crush and sieve the fast material with large particle size to obtain a first-grade sieved product.

[0052] (3) Drying, grinding, and secondary screening of the primary screening product and the fine material to obtain a secondary screening product of construction spoil.

[0053] (4) Crushing the...

Embodiment 2

[0061] The construction spoils are all silty soil, and additional granite tailings powder needs to be added for compounding.

[0062] The high-temperature sintered spoil lightweight ceramsite is fired according to the following formula:

[0063]

[0064] The steps of the preparation method of the above-mentioned ecological sintered spoil lightweight ceramsite are as follows:

[0065] (1) Dry and sieve the construction spoil to obtain coarse and fine materials with large particle sizes.

[0066] (2) Further crush and sieve the fast material with large particle size to obtain a first-grade sieved product.

[0067] (3) Grinding and secondary screening the primary screening product and fine material to obtain a secondary screening product of construction spoil.

[0068] (4) Crushing the waste glass powder, and then sieving to obtain glass powder particles with a particle size less than 3.35 mm. The glass particles are ground to obtain waste glass powder.

[0069] (5) Pass t...

Embodiment 3

[0076] The construction spoil is a mixture of construction dregs and muddy soil with a mass ratio of 2:1.

[0077] The high-temperature sintered spoil lightweight ceramsite is fired according to the following formula:

[0078]

[0079] The steps of the preparation method of the above-mentioned ecological sintered spoil lightweight ceramsite are as follows:

[0080] (1) Dry and sieve the construction spoil to obtain coarse and fine materials with large particle sizes.

[0081] (2) Further crush and sieve the fast material with large particle size to obtain a first-grade sieved product.

[0082] (3) Drying, grinding, and secondary screening of the primary screening product and the fine material to obtain a secondary screening product of construction spoil.

[0083] (4) Crushing the waste glass powder, and then sieving to obtain glass powder particles with a particle size less than 3.35 mm. The glass particles are ground to obtain waste glass powder.

[0084] (5) Pass the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing light-weight ceramsite by using bio-coal ecological sintering spoil. In parts by weight, 30-60 parts of construction spoil, 20-40 parts of fly ash, and 15-30 parts of granite tailings powder, 5-15 parts of glass powder, 1-3 parts of foaming agent and 2-5 parts of flux, using bio-coal as fuel and firing at high temperature. Compared with the prior art, the invention realizes the reuse of construction spoils, reduces the use of clay, and uses biological raw materials to produce bio-coal as a heating source, which can greatly reduce the consumption of electric energy and fossil energy, and help reduce costs.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing lightweight ceramsite by using bio-coal ecological sintering spoil. Background technique [0002] As a light aggregate, lightweight ceramsite has the characteristics of low density, high strength, heat preservation and heat insulation. It has a wide range of uses, not only can be used for sewage treatment filter materials, adsorbents, etc., but also can replace some ordinary sand and gravel to prepare raw materials for light aggregate concrete and related building products. [0003] Construction spoil is a large category of construction waste. With the unprecedented rapid urbanization process, construction spoil mainly excavated from foundation pits in urban new construction and reconstruction projects has caused serious damage to the ecological environment. However, the recycling rate of construction waste is less than 5%. As a bulk solid w...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B35/622C04B33/132C04B33/13C04B18/02C04B38/02C10L5/44
CPCC04B18/027C04B33/13C04B33/132C04B35/622C04B35/62204C04B38/02C04B2235/3208C04B2235/36C04B2235/3826C04B2235/656C04B2235/6562C04B2235/6567C10L5/447Y02E50/10Y02E50/30Y02P40/60
Inventor肖建庄郝潞岑段珍华
OwnerTONGJI UNIV